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The 800W SBC800 Powered LFE/Sub-Bass and LCR Controller from Quested is a bass management tool for music and film production designed to improve the low frequency response of surround sound or film monitoring systems. It has enough power and connectivity to support up to three X12 or X15 subwoofers (not included). Its back panel features individual LCR inputs and outputs as well as an LFE input, while its front panel provides adjustable controls of gain and phase for each section independently. The SBC800 provides EQ for all outputs and amplification for subwoofer outputs. The mono output is 800W into 4Ω and output level is monitored with an LED display. This unit is rack-mountable (2RU).



  • Amplifier provides 800W RMS of continuous power for a strong, low-distortion performance
  • Two XLR/TRS combo input jacks and two XLR outputs on rack unit for wide system compatibility
  • Adjustable controls for LCR, LFE, and PEQ sections
  • Two bands of parametric equalization to adjust LF response to suit different applications
  • 800W into 4Ω output level monitored with LED display
  • Controls include crossover frequency selection, gain control, high and low pass filters, a polarity switch, and a phase switch for the best performance with your monitor speakers and workspace

Quested SBC800 Powered LFE/Sub-Bass and LCR Controller

$3,349.00 Precio
$3,181.55Precio de oferta

Signal Processing SBC800


4 x XLR and 1/4" combination sockets, inputs female
3 x XLR outputs, male
2 pairs of 4 mm banana socket, speaker binding posts +/- , female
1 x 3.5 mm phone jack, system bypass link and remote switching, female
1 x IEC, power input


XLR and 1/4" Combination Sockets: 10 kΩ, electronically balanced
XLR Outputs: <100 Ω, electronically balanced

High Pass Filter

-3 dB at 7 Hz, 24 dB/Oct

Low Pass Filter

-3 dB at 100 kHz


Left, Center, Right (LCR) Channel:
Phase: 0 - 180°
Frequency: 30 Hz - 90 Hz, adjustable crossover frequency
Bypass/Sub-Off: Switches LCR inputs directly to LCR outputs
Mix Level: -16 dB to +6 dB relative to LCR input

Low Frequency Effects (LFE) Channel:
Gain: -16 dB to +6 dB relative to LCR input
+10 dB Boost: Switched, for LFE input
Frequency: 50 Hz - 150 Hz, adjustable low pass filtering
Phase: 0 - 180°
Bypass: Switched, for LFE section

Parametric Equalizer (PEQ) Section:
Frequency: 20 - 90 Hz
Width: Q Factor 0.5/3.0
Gain: -6 dB to +6 dB
Phase/Polarity: 180° phase reversal
Sub Solo: Mutes all outputs except subwoofers

Mono Output

800 W @ 4Ω
400 W @ 8Ω

Hum and Noise

<-105 dB (referred to clip level)


<0.03% at levels up to 1 dB below clip level

Power Requirements

115 / 230 VAC, 50/60 Hz


115 VAC (80 to 127 VAC maximum)
230 VAC (160 to 255 VAC maximum)

Power Consumption

45 W (quiescent current)


19.0 x 3.5 x 11.8" (48.2 x 8.8 x 30.0 cm)


23.1 lb (10.5 kg)

Packaging Info

Package Weight

25.765 lb

Box Dimensions (LxWxH)

23.3 x 17.8 x 8.1"

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